package num1;

public class Test2 {
	public static void main(String[]args){
		int num1=10;
		int num2=20;
		num1=num1+num2;
		num2=num1-num2;
		num1=num1-num2;
		System.out.println("num1:"+num1);
		System.out.println("num2:"+num2);
	}

}
